Core retainer for centrifugal molds



SePt- 25, 1950 D. R. TUGGLE 2,523,603

cbm RETAINER Foa CENTRIFUGAL Moms- Filed Nov. 13. 194'? Patented Sept. 26, 1950 UNITED STATES ATENT OFFICE CORE' RETAINER, FOR lCENTRIFUGAL MOLDS Dewey It. Tuggle, Birmingham, Ala.` Application November 13, 1947, Serial No. 785,613

3 Claims. 1

This invention relates to a tool for use in combination with a cast iron pipe mold. In the manufacture of such pipe it is necessary to insert a baked sand core into the end of the pipe mold in order to have the end of the pipe formed with uniform thickness for making aproper joint. The core used for the purpose has a tapered circumference edge adapted to fit within and adjacent a corresponding tapered face in the end of the mold. It is necessary for the pipe end to be properly finished that the sand core be set in an exact and aligned position, otherwise the piece of pipe will have a defective joining end and cannot be used. At present make-shift devices are used to line upl the core resulting in many defective pieces of pipe having to be remade. The present invention provides a simple and highly efficient tool for the purpose.

Further objects are to provide such a tool that will be cheap to manufacture, easy to use, and very durable.

Other objects and advantages will Iappear from the drawings and description.

By referring to the drawings which are part of this application, it willvbe observed that Fig. l is a part sectional and part full view of the end of a mold showing the sand core therein and the aligning tool attached as used for properly inserting and holding the core in place for casting a piece of pipe; Fig. 2 is a detail View showing one of the cams with notch therein for holding it in place when the tool is in use; Fig. 3 is an end viewv of the mold with the tool attached; and Fig. 4 is a side view of the end of the mold with the tool in full lines as the tool appears in position for use and the tool in broken lines just before it is seated for use.

Similar reference numerals refer to similar parts throughout the several views.

Referring to the drawings in detail it will be seen that the tool comprises a round shaft I with two cams 2 mounted in fixed position thereon. The shaft is provided with a fixed lever handle 3 adapted to turn the shaft and cams. Removably attached by bolts 4 to the mold flange 5 are two brackets 6 with a slot l in each adapted for the shaft to fit therein. The sand core consists of a metal angle flange 8 with the sand 9 baked therein. This core is adapted to fit into the end of the mold i@ in tapered position as shown by the taper ii of the core flange and the taper i2v of the'mold. The cams are provided with notches i3.

From the foregoing it will appear that in order to use the tool the two brackets are attached with bolts to the liange end of the mold, then the sand core is set in place for inserting into the end of the mold, then the shaft with fixed cams is placed in the brackets with the lever handle extended outward from the mold end, then the handle is moved to cause the cams to exert pressure evenly against the core flange, to thus press the core into place in an exact and aligned position with its tapered flange face adjacent the tapered face of the mold end. In Fig. 1 the core flange is plainly shown seated at I4 but this seating does not always result because of variations in the sizes of the cores. Such variations are taken care of by the present tool because it inserts the core evenly if not seated to thus insure uniform thickness of the end of the pipe. When the cams are set the notches in the cams prevent them from moving out of fully extended position adjacent the core flange, and in this position the lever handle is parallel with the face of the core as shown in Figs. 1, 3 and 4.

The tool may be made of any kind of metal suitable for the purpose. Itv also may be made in various sizes to accommodate different sizes of cores in the manufacture or casting of cast iron pipe. Also the tool may be used for other purposes where such a tool is necessary.

While I 'have shown and described the preferred embodiment of my invention, I do not .wish to limit same to the exact and precise details of structure, but reserve the right to make all modifications and changes so long as they remain within the spirit and scope of the following claims.

Having described my invention I claim:

1. In a core retainer for centrifugal molds comprising; two supporting brackets, each bracket defining a fiat base portion and an extending portion at a degree angle compared to the base portion, a slot in the extended portiorrof each bracket, the bottom of each slot being half of a circle in shape, a round shaft, said shaft adapted for being supported by its ends in said slots and also being partly revolvable therein, two cams mounted in xed similar positions on the shaft, a notch in the center of each 4outer face of each cam, said notches being adapted forretaining the cams in set position on an adjacent flat surface, a, lever handle mounted in fixed position on the said shaft with the major axis of the handle at a 90 degree angle cornpared to the major axes of the said cams.

2. In a core retainer for centrifugal molds of the character described according to claim 1, being further characterized by having bolt and nut means adapted for attaching its said brackets to a ange placed adjacent the brackets.

3. In a core retainer for centrifugal molds comprising; two identical supporting brackets, each bracket having a flat base portion and an integral extending portion positioned at a 90 degree angle compared to the base portion, each said base portion having a bolt hole therethrough, each said extending portion having a slot formed therein with its bottom defining a half circle shape, each bracket being adapted for being supported for use on a bolt; a round shaft, said shaft adapted for being supported by its ends in said slots and being partly revolvable therein when said brackets are in position for use; two cams mounted and spaced apart on said shaft, a notch in the center of each outer face of each cam, said notches being adapted for retaining the cams in set positions on an adjacent flat sur- REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,486,622 Angell Mar. 1l, 1924 1,542,643 Pettis June 16, 1925 1,675,716 Losey July 3, 1928 1,795,637 Carrington Mar. 10, 1931 2,281,867 Anthony May 5, 1942 

